Ok apparently after patching Browscap you need to uninstall the module and reinstall it, since it modifies the .install file. This resolves the error. However there appears to be a problem with the patch that results in a different error.

I get this error too. Disabled the module, applied both the patches mentioned in the posts (one in this thread and the other in the thread where the first patch is mentioned), enabled the module and I still got the error while adding a device.

So I disabled the module, uninstalled it and re-enabled the module and now the error is resolved.

(BTW the first patch modifieds the install file while the second modifies the import file)